Hot pressing sintering clamp for diamond tool bit

Abstract

The utility model discloses a hot pressing sintering clamp for a diamond tool bit, and belongs to the technical field of saw blade production. The clamp comprises a fixing frame; the fixing frame comprises a pair of threaded holes formed in the two adjacent side faces of the fixing frame and a heating hole formed in the other face without the threaded holes. And the positioning structure comprises a plurality of positioning bolts, an abutting plate, a heat insulation plate and a plurality of carbon plates. The hot-pressing sintering clamp for the diamond tool bits can be used for simultaneously and intensively hot-pressing a plurality of groups of diamond tool bits, so that the production efficiency is remarkably improved, the large-batch production requirement is met, in addition, the clamp can effectively keep uniform distribution of temperature in the heating process through fitting and covering of a plurality of carbon plates, uniform conduction of heat is facilitated, and the service life of the diamond tool bits is prolonged. Therefore, the sintering quality problem caused by uneven temperature is avoided, the physical performance and the cutting performance of the tool bit are improved, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to saw blade production technical field especially relates to a diamond tool bit hot press sintering fixture. BACKGROUND

[0002] The diamond tool bit is the working main body of the diamond saw blade, and the tool bit of the diamond saw blade is composed of diamond and matrix binder, the diamond is a superhard material, and plays the role of cutting edge.

[0003] The diamond tool bit is manufactured by using the sintering method, the diamond tool bit raw blank needs to be hot-pressed and sintered under the conditions of high temperature and high pressure, the tool bit raw blank needs to be fixed by using the fixture during sintering, the existing sintering fixture is mainly used for processing single or a small amount of tool bits, the production efficiency is low, and the existing sintering fixture cannot meet the demand of large-scale production, in addition, the existing fixture is difficult to keep the uniform distribution of temperature during heating and pressing, which has an adverse effect on the sintering quality of the tool bit, and further affects the cutting performance and service life of the tool bit. SUMMARY

[0004] The utility model discloses a diamond tool bit hot press sintering fixture to solve the problem that the existing hot press sintering fixture cannot be used for large-scale production and is difficult to keep the uniform distribution of processing temperature.

[0005] To solve the above technical problems, the utility model provides a diamond tool bit hot press sintering fixture, including fixed frame, the fixed frame is annular square frame shape, the center is the square opening of through, the outside is the closed square frame structure, the four edges of square frame are curved and form the smooth edge, it includes a pair of threaded holes set in adjacent two side faces, heating hole is arranged in the other side face not set threaded hole,

[0006] Positioning structure, the positioning structure includes a plurality of positioning bolts, sets up the abutting plate on one side of the positioning bolt, sets up a plurality of heat insulating plates on one side of the abutting plate and sets up a plurality of carbon plates on one side of the heat insulating plate.

[0007] Preferably, the fixed frame further includes a support bottom pad arranged at the bottom thereof.

[0008] Preferably, the abutting plate has two pieces, which abut on one side of the positioning bolt respectively.

[0009] Preferably, the heat insulating plate has four pieces, two heat insulating plates are arranged on one side of the abutting plate, and the other two heat insulating plates are arranged on the inner wall of the fixed frame.

[0010] Preferably, the carbon plate includes a first carbon plate and a second carbon plate.

[0011] The first carbon plate is arranged between the opposite heat insulation plates.

[0012] The second carbon plate is arranged between two adjacent first carbon plates.

[0013] Preferably, a plurality of tool bit cavities are formed around the carbon plates, and the diamond tool bits are stacked in the tool bit cavities and clamped and positioned by positioning bolts.

[0014] Preferably, the height of the diamond tool bit stack after the stacking is about 1 / 2 of the thickness of the diamond tool bit higher than the height of the carbon plate.

[0015] Compared with the prior art, the diamond tool bit hot-pressing sintering clamp has the advantages that the diamond tool bits are first stacked in the tool bit cavities, and the carbon plates are tightly attached to the diamond tool bit stack in the tool bit cavities by a plurality of carbon plates, the carbon plates are pressed and locked by a plurality of positioning bolts, a plurality of groups of diamond tool bits can be simultaneously and centrally hot-pressed by the clamp, the production efficiency is significantly improved, the production demand of large quantities is met, the clamp can effectively maintain the uniform distribution of temperature in the heating process by the attachment and coverage of the plurality of carbon plates, the uniform conduction of heat is facilitated, the sintering quality problem caused by the non-uniform temperature is avoided, the physical properties and cutting performance of the tool bit are improved, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a working principle schematic view of a diamond tool bit hot-pressing sintering clamp provided by the utility model;

[0017] Fig. 2 is a whole structure schematic view of a diamond tool bit hot-pressing sintering clamp provided by the utility model;

[0018] Fig. 3 is an internal structure schematic view of a diamond tool bit hot-pressing sintering clamp provided by the utility model;

[0019] In the figure: 1, fixed frame; 2, positioning structure; 101, threaded hole; 102, heating hole; 103, support bottom pad; 201, positioning bolt; 202, abutting plate; 203, heat insulation plate; 204, carbon plate; 204a, first carbon plate; 204b, second carbon plate; 205, tool bit cavity. DETAILED DESCRIPTION

[0020] The utility model will be further explained in detail in combination with the drawings and specific embodiments. The advantages and features of the utility model will be more clear according to the following description and claims. It should be noted that the drawings are all very simplified and use non-precise proportions, only to facilitate, clearly assist the purpose of explaining the embodiment of the utility model.

[0021] In the description of the utility model, it is necessary to understand that the orientation or positional relation indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relation based on the orientation or positional relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0022] In the description of the utility model, it should be explained that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances. Embodiment

[0023] The utility model provides a diamond tool bit hot press sintering fixture, please refer to Figs. 1-3 , including fixed frame 1, the fixed frame 1 is annular square frame shape, the center is the square opening of through, the outside is the closed square frame structure, the four edges of square frame are evenly curved to form the smooth edge, and it includes a pair of threaded holes 101 set in adjacent two side faces, heating hole 102 is arranged on the other side of not set threaded hole 101;Positioning structure 2, the positioning structure 2 includes a plurality of positioning bolts 201, the abutting plate 202 is arranged on one side of the positioning bolt 201, a plurality of heat insulation plates 203 are arranged on one side of the abutting plate 202, and a plurality of carbon plates 204 are arranged on one side of the heat insulation plate 203.

[0024] The fixing bracket 1 further includes a support bottom pad 103 provided at its bottom; there are two abutting plates 202, which are respectively abutted against one side of the positioning bolt 201; there are four heat insulation plates 203, and two heat insulation plates 203 are abutted against one side of the abutting plate 202, and the other two heat insulation plates 203 are abutted against the inner wall of the fixing bracket 1; the carbon plate 204 includes a first carbon plate 204a and a second carbon plate 204b; the first carbon plate 204a is arranged between the heat insulation plates 203 on the opposite surfaces; the second carbon plate 204b is arranged between two adjacent first carbon plates 204a; a plurality of tool bit cavities 205 are formed around the carbon plates 204, and the diamond tool bits are stacked in the tool bit cavities 205 and clamped and positioned by the positioning bolt 201; the height after the stacking of the diamond tool bits is about 1 / 2 of the thickness of a diamond tool bit higher than the height of the carbon plate 204.

[0025] It should be noted that the hot press sintering machine for this diamond tool bit hot press sintering fixture presses and forms the original blank of the diamond tool bit through a press, and at the same time, an electromagnetic wave heater is used on the outside to pass through the heating holes to heat the carbon plate 204. The carbon plates 204 in the fixture are connected and fitted to each other. The tool bit stack is fixed between the carbon plates 204. The carbon plates 204 are made of graphite material and have a very high thermal conductivity, which can effectively distribute the heat evenly to the entire workpiece, avoiding local overheating or uneven cooling, thereby improving the quality of the sintering process. In addition, the thermal expansion coefficient of graphite is relatively low, which means that during the heating and cooling processes, its size change is relatively small, which helps to maintain the dimensional accuracy of the sintered part.

[0026] Preferably, in this embodiment, there are three first carbon plates 204a and six second carbon plates 204b, which divide the fixture into four tool bit cavities 205 in a "field" shape. In other embodiments, the number of carbon plates 204 can be increased or decreased according to the hot pressing area of the hot press to change its shape.

[0027] Preferably, as <​​​​​

[0029] Preferably, the heat insulation plate 203 has four pieces, two of which are in contact with the abutting plate 202 and do not contact the screw rod, and the other two are in contact with the inner walls of the fixed frame 1 except the two sides provided with threaded holes 101, wherein, the heat insulation plate 203 corresponding to the side provided with heating holes 102 and the fixed frame 1 are also provided with another heating hole, so as to facilitate the direct heating of the internal carbon plate by the electromagnetic wave heater, and the heat insulation plate 203 is made of rock wool board, which is used to isolate the heat generated by the electromagnetic wave heater in the clamp, prevent heat dissipation, provide heat preservation effect, and enhance the hot pressing effect.

[0030] Preferably, after the diamond tool bit is stacked, the height of the diamond tool bit is about 1 / 2 of the thickness of the carbon plate, and the purpose is to leave enough strain and deformation compensation for the tool bit. During the hot pressing process, the tool bit will expand and deform under the action of heating and pressing. The remaining amount of pressure can ensure that the tool bit can still effectively apply pressure under the condition of material deformation, thereby ensuring the stability and uniformity of the whole process. In addition, if the tool bit is flush with or lower than the carbon plate 204, the hardness of the diamond tool bit is much higher than that of the carbon plate, so it is very likely to damage the carbon plate 204 when pressing down, causing economic loss.

[0031] In summary, the diamond tool bit hot pressing sintering clamp first stacks the diamond tool bit in the tool bit cavity, and tightly abuts the diamond tool bit stack in the tool bit cavity through multiple carbon plates. The carbon plates are squeezed and locked by multiple positioning bolts. Through the clamp, multiple groups of diamond tool bits can be stacked and simultaneously concentrated hot pressed, which significantly improves the production efficiency and meets the mass production demand. In addition, through the lamination of multiple carbon plates, the clamp can effectively maintain the uniform distribution of temperature during heating, which helps to realize uniform heat conduction, thereby avoiding the sintering quality problem caused by uneven temperature, thereby improving the physical properties and cutting performance of the tool bit and prolonging the service life.

[0032] The above description is only a description of the preferred embodiment of the utility model, and does not limit the scope of the utility model. Any modification made by a person skilled in the art according to the above disclosure is within the protection scope of the claims.

Claims

1. A diamond tip hot press sintering jig, characterized by, Include: Fixed frame (1); the fixed frame (1) is annular square box shape, the center is through the square opening, the outside is closed box structure, the four edges of the square box are evenly curved to form smooth edges, which includes a pair of threaded holes (101) opened on its adjacent two sides, a heating hole (102) arranged on the other side not opened with threaded hole (101); Positioning structure (2), the positioning structure (2) includes a plurality of positioning bolts (201), a butt plate (202) arranged on one side of the positioning bolt (201), a plurality of heat insulation plates (203) arranged on one side of the butt plate (202), and a plurality of carbon plates (204) arranged on one side of the heat insulation plate (203).

2. A hot press sintering fixture for diamond tool bits as claimed in claim 1, wherein, The fixed frame (1) further comprises a supporting bottom pad (103) arranged at the bottom thereof.

3. A hot press sintering fixture for diamond tool bits as claimed in claim 1, wherein, The butt plate (202) has two, respectively abutting on one side of the positioning bolt (201).

4. A hot press sintering fixture for diamond tool bits as claimed in claim 3, wherein, The heat insulation plate (203) has four, which is provided with two heat insulation plates (203) abutting on one side of the butt plate (202), and the other two heat insulation plates (203) abutting on the inner wall of the fixed frame (1).

5. A hot press sintering fixture for diamond tool bits as claimed in claim 4, wherein, The carbon plate (204) includes a first carbon plate (204a) and a second carbon plate (204b); The first carbon plate (204a) is arranged between the opposite heat insulation plates (203); The second carbon plate (204b) is arranged between the adjacent two first carbon plates (204a).

6. A hot press sintering fixture for diamond tool bits as claimed in claim 5 wherein, The carbon plate (204) is surrounded by a plurality of tool bit cavities (205), and the diamond tool bit is stacked in the tool bit cavity (205) and clamped and positioned by the positioning bolt (201).

7. A hot press sintering fixture for diamond tool bits as defined in claim 1, wherein The height of the diamond tool bit after stacking is about 1 / 2 of the thickness of the diamond tool bit higher than the height of the carbon plate (204).

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